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Organic farming expansion drives natural enemy abundance but not diversity in vineyard‐dominated landscapes

Muneret, Lucile; Auriol, Arthur; Bonnard, Olivier; Richart-Cervera, Sylvie; Thiery, Denis and Rusch, Adrien (2019) Organic farming expansion drives natural enemy abundance but not diversity in vineyard‐dominated landscapes. Ecology and Evolution, pp. 1-11.

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Document available online at: https://hal.inrae.fr/hal-02620857


Summary

Organic farming is seen as a prototype of ecological intensification potentially able to conciliate crop productivity and biodiversity conservation in agricultural landscapes. However, how natural enemies, an important functional group supporting pest control services, respond to organic farming at different scales and in different landscape contexts remain unclear. Using a hierarchical design within a vineyard-dominated region located in southwestern France, we examine the independent effects of organic farming and semi-natural habitats at the local and landscape scales on natural enemies. We show that the proportion of organic farming is a stronger driver of species abundance than the proportion of semi-natural habitats and is an important facet of landscape heterogeneity shaping natural enemy assemblages. Although our study highlights a strong taxonomic group-dependency about the effect of organic farming, organic farming benefits to dominant species while rare species occur at the same frequency in the two farming systems. Independently of farming systems, enhancing field age, reducing crop productivity, soil tillage intensity, and pesticide use are key management options to increase natural enemy biodiversity. Our study indicates that policies promoting the expansion of organic farming will benefit more to ecological intensification strategies seeking to enhance ecosystem services than to biodiversity conservation.


EPrint Type:Journal paper
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 2045-7758
DOI:10.1002/ece3.5810
Related Links:https://hal.inrae.fr/hal-02620857/document
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41158
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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